adb64 - 12:10 pm on Jun 1, 2006 (gmt 0)
Yes, I've seen this before with a site written in MS-Word and saved as HTML. Word then also saves an image with the page contents as how it will be rendered by IE. In the page there is a lot of MS proprietary markup which is understood only by IE. When viewed e.g. in Firefox, Firefox will display the image.
This also means that a spider simulator will behave like Firefox and only see the image and not the MS proprietary formatting and text which is between HTML comment tags.